body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background: linear-gradient(120deg, #e74c3c, #ffffff);
    background-size: 200% 200%;
    animation: gradientAnimation 60s ease infinite;
}

#app {
    text-align: center;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #e74c3c;
}

#timer {
    margin: 20px 0;
}

#time-display {
    font-size: 48px;
    margin-bottom: 20px;
    transition: color 0.5s ease, transform 0.5s ease;
}

button {
    background-color: #e74c3c;
    color: #fff;
    border: none;
    padding: 10px 20px;
    margin: 5px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

button:hover {
    background-color: #c0392b;
}

button:active {
    transform: scale(0.95);
    transition: transform 0.1s;
}

#session-management {
    margin-top: 20px;
}

#session-count {
    font-weight: bold;
}

#settings {
    margin-top: 20px;
    text-align: left;
}

label {
    display: block;
    margin: 10px 0 5px;
    color: #333;
}

input[type="number"] {
    width: 60px;
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin-bottom: 10px;
}

@keyframes gradientAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
} 